diff --git a/.travis.sh b/.travis.sh
index f16b32ca..04d32dfb 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -3,7 +3,7 @@ set -e
 if [ "$ANALYZE" = "true" ] ; then
 	cppcheck --error-exitcode=1 -j2 -UTESTING -Iopl -Isrc -Isrc/setup opl pcsound src textscreen > /dev/null
 else
-	./autogen.sh
+	./autogen.sh --enable-werror
 	make
 	make install DESTDIR=/tmp/whatever
 	make dist